Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 79 insertions, 0 deletions

diff --git a/arch/loongarch/kernel/reset.c b/arch/loongarch/kernel/reset.c
new file mode 100644
index 0000000000..1ef8c63835
--- /dev/null
+++ b/arch/loongarch/kernel/reset.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#include <linux/kernel.h>
+#include <linux/acpi.h>
+#include <linux/efi.h>
+#include <linux/export.h>
+#include <linux/pm.h>
+#include <linux/types.h>
+#include <linux/reboot.h>
+#include <linux/delay.h>
+#include <linux/console.h>
+
+#include <acpi/reboot.h>
+#include <asm/idle.h>
+#include <asm/loongarch.h>
+#include <asm/loongson.h>
+
+void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
+
+void machine_halt(void)
+{
+#ifdef CONFIG_SMP
+	preempt_disable();
+	smp_send_stop();
+#endif
+	local_irq_disable();
+	clear_csr_ecfg(ECFG0_IM);
+
+	pr_notice("\n\n** You can safely turn off the power now **\n\n");
+	console_flush_on_panic(CONSOLE_FLUSH_PENDING);
+
+	while (true) {
+		__arch_cpu_idle();
+	}
+}
+
+void machine_power_off(void)
+{
+#ifdef CONFIG_SMP
+	preempt_disable();
+	smp_send_stop();
+#endif
+#ifdef CONFIG_PM
+	if (!acpi_disabled)
+		enable_pci_wakeup();
+#endif
+	do_kernel_power_off();
+#ifdef CONFIG_EFI
+	efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL);
+#endif
+
+	while (true) {
+		__arch_cpu_idle();
+	}
+}
+
+void machine_restart(char *command)
+{
+#ifdef CONFIG_SMP
+	preempt_disable();
+	smp_send_stop();
+#endif
+	do_kernel_restart(command);
+#ifdef CONFIG_EFI
+	if (efi_capsule_pending(NULL))
+		efi_reboot(REBOOT_WARM, NULL);
+	else
+		efi_reboot(REBOOT_COLD, NULL);
+#endif
+	if (!acpi_disabled)
+		acpi_reboot();
+
+	while (true) {
+		__arch_cpu_idle();
+	}
+}